The Washer,flat, cataloged under National Stock Number 5310-01-288-7854, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-288-7854 |
| Primary Part Number | S3123A |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material | NICKEL ALLOY 400 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| S3123A PRIMARY | Circor Pumps North America Llc (USA) |
| HC201H | Siemens Energy, Inc. (USA) |
| H-2976 PIECE 014 | Siemens Energy, Inc. (USA) |
| HC-201H/0803 | Siemens Energy, Inc. (USA) |
NSN 5310-01-288-7854 is a Washer,flat, manufactured by Circor Pumps North America Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-288-7854 has 4 manufacturer part numbers on file: S3123A (Circor Pumps North America Llc), HC201H (Siemens Energy, Inc.), H-2976 PIECE 014 (Siemens Energy, Inc.), HC-201H/0803 (Siemens Energy, Inc.).
Key specifications for S3123A: Material Document and Classification: QQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: NICKEL ALLOY 400 OVERALL. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.